HTTP + XML 报文的接口开发-优快云博客

本文介绍了一个使用Java进行XML文件解析及发送的例子。服务端利用SAXReader读取客户端发送的XML请求，并处理其中的数据。客户端则构造XML请求并发送到指定的服务端地址。文章通过具体代码展示了如何实现这一过程。

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服务端：

InputStream in = request.getInputStream();
        SAXReader saxReader = new SAXReader();
        InputStreamReader strInStream = new InputStreamReader(in, "UTF-8");
        try {
            Document document = saxReader.read(strInStream);
            Element root = document.getRootElement();
            Iterator lv = root.elementIterator("FILE");
            Element el = null;
            while (lv.hasNext()) {
                el = (Element) lv.next();                
                System.out.println(el.elementText("FILE_STRING"));
                System.out.println(el.elementText("FILE_NAME"));
                //逻辑处理
            }
            //String file = document.selectSingleNode("/FILE/FILE_STRING").getText();
            //System.out.println(file);
        } catch (DocumentException e) {
            e.printStackTrace();
        } 
        
        //返回报文
        Document document = DocumentHelper.createDocument();
        Element rootElement = document.addElement("RET_INFO");
        addElement(rootElement,"RESULT", "操作成功");
        DataOutputStream out = new DataOutputStream(response.getOutputStream());
        XMLWriter writer = new XMLWriter(out);
        writer.write(document);
        writer.close();
        out.flush();

客户端：

Document document = DocumentHelper.createDocument();
            Element rootElement = document.addElement("FILELIST");
            Element planElement = rootElement.addElement("FILE");
            addElement(planElement,"FILE_STRING", r1);
            addElement(planElement,"FILE_NAME", r2);
            
            Element planElement2 = rootElement.addElement("FILE");
            addElement(planElement2,"FILE_STRING", "MMMMMMMMM");
            addElement(planElement2,"FILE_NAME", "NNNNNNNNNN");
            
            HttpURLConnection http;
            
            try {
                URL urls = new URL("http://127.0.0.1:800/aa/servlet/Test");
                http = (HttpURLConnection) urls.openConnection();
                http.setDoOutput(true);
                http.setDoInput(true);
                http.setRequestMethod("POST");
                DataOutputStream out = new DataOutputStream(http.getOutputStream());                
                XMLWriter writer = new XMLWriter(out);
                writer.write(document);
                writer.close();
                out.flush();
                
                //System.out.println( in(http.getInputStream()));
                //接口返回的报文
                Document rt =  in_doc(http.getInputStream());
                System.out.println(rt.selectSingleNode("/RET_INFO/RESULT").getText());
                
            } catch (Exception ex) {
                ex.printStackTrace();
            }